ZWJ, ZWNJ characters:

^ = ZWJ (zero width joiner)
^^ = ZWNJ (zero width non joiner)
Usually when a consonant cluster (two or more consecutive consonants)
occurs, it will be rendered as a ligature if that is available in the
font. The ZWJ and ZWNJ can be used to produce an alternate rendering of
the ligatures.
If a consonant is followed by the ZWJ, half-form of the consonant is
formed.

HinKhoj InfoLabs LLP

HinKhoj Dictionary is free online Hindi to English and English to Hindi Dictionary and translation service. Best and most easy to use dictionary available on internet.